Valve



March 8,1927. 1,620,315

w. E. BAKER VALV E Filed NOV. 2l. 1925 \\\V\\\\\\ \\\\\\\\\\\\\\\\\\\\\\`A\\\\\\\\\\\\N un j /fl ull/f Patented Mar. 8, 1927.

1,620,315!l Per enr efr-laire.,n.,

WiLLiA-iii n. Banen, or Yoiinvni;ann, onto, rouvrir-imma: Enden. BAKER AND;enononALmoiv:Fianiv'rz, Tniisrniis orari-in iviinniieiivnnniive COMPANY,

OF CLEVELAND, OHIO.

y VALVE.

Application ledNoveifnber 21, 1925; Serial No.` 70,472.

Mv invention relates to a novelwindimproved throttle valve and more particularly to ,one designed 'for use to control the passage of}steani from a generatorto an engine. 'It i'sof course,understood that myinvention may beemployed in any other situation where itis found to be applicablemnd while Ilshall7 forib'revity, use the term steam throughout the speciiication, it is understood that steam is merely used as exemplary ofany fluid under pressure.

It is .the principalobject of myjinvention to providea throttle valve which shall permit perfect controlof'the flow of steam there througlrand'without the objectionable friction which is' normally present in valves.. This friction is usually caused because ofthe fact that the valve must be operated in one direction against the pressure ofthe steam'. I have devised a '.hrottl'e valve wherein the pressiireof'the steam is overcome through a cani action, which taires very little pressure on the `operating` lever and is held'closed by steam pressure whenv it is once closed;

A further ob'ect of my invention is Ato provide an. arrangement whereby the flow, of steam may be'easily and accurately regulated and'yet without vthe ydanger of leakage, and whereby the steam shall be automatically shut oif'iipon breakage ofthe valve operating` means Fiii'tlier-objects of my invention will become apparent to those skilled in the art duri'ngvthe. progress the description, when read'in connection with the accompanying` drawing` in which Fig. l is a longitudinal section taken through a selectedembodiment of my invention.

Fig. '2 is a section on the line 2 2 of Fig. l.

F a view ofthe throttle valve detached from the casing.`

Fig, 4 is an end viewof the throttle valve taken `from the right ofFig:

Fig. 5 is an elevation of thel auxiliary-v valve detached" from the casing.

Fig. Gxis a. bottom view of the valve shown inFig, 5.

7 is a-pei'spective view of; the operating member by which the two valves are moved in unison.

Referring now to the drawings in detail I liave.shovvn my invention as embodied in a casing l provided with a chamber 2 of gene alreotangular form and having-the two oppositely disposed walls 3 and l. These .walls are apertured at 5 and 6 respectively, these apertures forming communicating passageways with the outside chamber 7; One of the other four walls 8 'is apertured at9 to form a communicating passageway between the chamber 2 and the chamber l0. The chamber l0 is adapted to receive steam which may pass thereto through a suitable pipe l1"` connected with any suitable means to the. valve casing.` Steam is adapted to pass from the chamber 7 throughthe. connection 12 to an engineer other device.

rllie throttle valve .is disposed'in the apertures 5 and 6 which form a double outlet for the' steam from the chamber 2. The valve is what is known as .the balanced` type and coniplris'es a member which is shownin Figs. l and 3 as consisting of a eentralreduced portion 18 terininatingin heads la and l5, these heads being received within the; apertures 5 and trespectively. l Eaohheadis provided with a cylindrical portion adapted to lit tightly within the aperture in which it recip-v rooates in order to close the aperture7 andat one sideof the cylindrical portion each head is provided with a portion of special'construction comprising radially Vdisposedribs 16, the `outer surface of eachl rib forming a continuation ofthe surface of the cylindrical portion. The ribs are joined to the cyl-indrical portion by oppositely disposedgspiralsurfaces 17 and 18. By this means the pressure of'steain on the valve is balanced or neutralized. That is, the pressure is exercised in both directions instead of in one direction only as in most valves. 'Ihis type off` balancedjvalve is broadly old, but its usein the application to which I havev put it I believe to be new. I prefer to modify the usual-type of balanced valve by making one head slightly larger than the other, and referring to Figs. 3 and Llit will beseen that the head 15 is made of slightly greater diameter than the head 111-.V That is, the valveis not exactly balanced, but there isalways a" tendency for the pressure of'steam in tli-e chamber 2 to inove the valve towards theright, as viewedin Fig. l. This will resultin closing of the valve and therefore this arrangement provides a safety device which will insure closing` ofthe valve upon breakage of' any of they operating parts whichy may be used to open the valve.

The throttle valve is operated by means of a. shaft 19 disposed transversely of the chamber 2 and above the valve. Secured to the shaft in any suitable manner is the operating member 2O comprising a pair of depending arms 2l terminating in forked ends 22 which receive the transverse pin 23 on the reduced portion 13 of the valve. The operating member also comprises a cam 24 for a purpose which will presently appear. Secured to the outer end of the shaft 19 is the lever 25 by which the shaft and consequently the throttle valve may be operated. This lever may be operated through any suitable connection, depending upon the type of device in which it is used. For example, if used in a vehicle, the lever 25 may be connected to a foot pedal. Movement of the valve is limited by suitable stops let and 15.

The throttle valve is shown closed in Fig. 1 and obviously in order to open the same the lever 25 would be rotated in a clockwise direction as viewed in that figure. This rotation would cause movement of the throttle valve to the left, during which movement whatever pressure of steam there may be 1n the chamber 2 will not offer much resistance. The valve 27 is lifted thereby equalizing pressure in the chamber 2 with chamber 10 and permitting the throttle valve to control the flow of steam. Therefore, the movement can be made without exerting a great deal of force and without friction, such as is bound to occur when the valve must be moved against a high pressure. In order to normally maintain the valve closed, it may be found desirable to employ resilient means tending to rotate the lever 25 in a counterclockwise direction, this means being exemplified by the spring 26, which may be secured to the lever and also to any fixed part of the device upon which the valve is em ployed. If either the lever 25 orl spring 26 should break, the valve will automatically close because of the slightly greater pressure which is exerted upon the head 15. This difference in pressure is so slight that the valve still retains substantially all the advantages of a balanced valve and I shall continue to refer to it as a substantially balanced valve and shall so claim it. The construction retains all the advantages of the balanced valve with the added advantage of the safety feature described above.

Vhile my invention may be operated when constructed in the manner described above, I prefer to employ an auxiliary valve 27, which as shown in Figs. 1, 2, 5 and 6 comprises a combination poppet and piston valve. This valve comprises the head 28 provided with the conical surface 29 adapted to contact with a correspondino'ly shaped surface in the aperture 9. as plainly shown in Figs. 1 and 2. Beneath the surface 29 is a cylindrical surface 30 which has a close lit with a corresponding surface in the aperture 9. Beneath the surface 30 are a plurality of radially extending ribs 31 whereby when the valve is lifted sufficiently in the aperture 9 steam may pass between the chambers 2 and 10.

The valve 27 is usually held in position by means of the pressure of steam entering the chamber 10. In order to lift the valve from its seat I provide it with the stem 32 which is adapted to contact with the cam 24, whereby upon rotation of the shaft 19 in a clockwise direction, as viewed in Fig. 1, the cam will gradually lift the valve and ultimately permit steam to pass from the chamber 1() to the chamber 2. `Wlien the valve 27 is lifted to a sutlicient extent to permit passage of steam through the aperture 9, it then becomes a floating' valve because of the fact that the pressure of the steam is sub; stantially the same on both sides of the valve. Of course, the valve will still rest against the cam 24 because of its weight, but this weight is negligible and not sulficient to in any way affect the operation of the throttle valve.

In operation the two valves work in unison. ris the shaft 19 is rotated in a clockwise direction, as viewed in Fig. 1 the throttle valve will be gradually moved to an open position. Before it is opened at all, however, the valve 2? has been opened to permit steam to pass into the chamber 2. It is important that the auxiliary valve 27 should open first, because if the throttle valve were open first then when the auxiliary valve is opened the steam would go through the aperture 9 with such force as to injure the valve in the manner known in the art as wire drawing. This action is minimized by the combination poppet and piston valve used for the auxiliary valve 27 and is still further minimized by the arrangement ust described whereby the steam passes from the chamber 1() to the chamber 2 before the throttle valve is opened. Obviously the valve 27 is not opened until the cylindrical surface 30 is disengaged from the corresponding surface in the aperture 9. Then, as stated above, the pressure on the two sides of the valve is sul'istantially equal so that there is very little tendency for the valve to close and therefore there is no pressure of steam to be overcome by rota tion of the shaft 19. Continued rotation of the shaft 19 will obviously open the throttle valve and the amount of opening may be varied as desired. As stated above, the throttle valve is balanced for all practical purposes, but a slightly unbalanced condition introduced by means of the difference in diameter of the heads in order to provide a safety arrangement.

From the above it will be apparent that I have achieved a novel and improved throttle llO the scope of igaoists Y valve wherein the Jar-in ount,l of steam passing therethrough may bercontrolled eiect ively..V `By the arrangement of throttle valve and auxiliary valve leakage isteiiectively prevented" and wirev drawing-i isz-'reduced toa ininimum. At-thelsame; time ai valve.` is achieved which mayv be veryyreadily operated as by the lever' and aga/insta. spring. This -arrangementffisf alpreferable one par-4 ticularly when "aj throttle valve is designed for use in a vehicle Where` av foot pedal is desired to'v bev usedl'V A-tfthesame timev the valve iis automaticallT closedy itthe :operative mechanism:breaks.`

f I' am aware thatchangesinV the form, convalve'controlling oneofv said passages and means actingiin unisonwith said valve tor controlling; another-ofY said passages. i

2. In a device"` `of tliewcl'ass described', valve .casinghaving-a chamber therein, said i chamber having passagesforming'V an-inlet and a double outlet, a substantially balanced valvecontrcllingftwo of' said passages, and an auxiliary valve operated by the iirstu named' valve and' controlling. the other oi said passages. f A

3; In a device otftheclass described, a valve casinghaving afchamber therein, said chamber having'passagesiorming: an inlet and aidoubleoutlet, a substantially balanced valve controlling two of saidpassages, an

' auxiliarfyvalve controlling tl'ieotherfoi said passages, andi means tofcperate said valves iny unison. i a

l at, In a: devicey of: theclassfdescribech -a valve casingfhaving chamberthereim, said chamber` having` passages` forming, aniinlet and an outlet',l a; substantially:balanced1 valve controlling one of said passages, an'auxiliary valve: controlling the ,Bother oi said passages, means to operate said valves in unison in one direction, and a spring normally holding said operatingmeans in position wherein both of said valves are closed.v Y l 5. In a device of the class described, a casing having a chamber therein, said chamber having an inlet and a double outlet for the passage of steam thereinto and therefrom, a substantially balanced valve controlling said outlets, and an auxiliary valve controlling said inlet and normally retained in closed position by the pressure of steam.

6. In a device of theclass described, a casing having a chamber therein, said. chamherhavingj aiu inlet.I` for the passage: ofi

ber having; an inlet; ancha dcuble outlet-for; the passage etisteami thereintcyandntherc from, aV substantialiytbalanced!valve; com trolline said.` outlets,l an;l aunilia'rj` valvefccnf. trolling sai d; inlet andi normally, retained;v in closed: positions. by the# pnessure off-steam, andfmeanstonoperate s aidivnlves iiuunai.` i

i". In a. device oit5 `the'class -describedta casing having a rchamber thereiin;saidachams bien having an.` inlet' and Outlet,fi- )rtlie passa-ge et steam,'thereintoy and: .therenifoim a. substantially". balanced valve? ccntiiolling said outlet,v an auxiliary valve ycontrolling saidinlct and "noifinallyf retained in! closed position by the pressure ofi steam, mean `to operate; said? valvesvin; unison inone di eratingL means. in positionf-wherein bctlin (it said valvesiare closed; LL 1 1 1 e Sr: ln.' a;-. device' off the;.class; described, a

g casing having. a chamber therein, saidf chainf Y ber having an inlet? tor the passageiofistfeani thereint o and: having va :doubl e. Outlet 'for the passa-geoi steam ther frenna; substantiall)1 balan'ced` valine controllingir the: `passage of' steam throughisa-it doubleoutletianthaavalve acting in unison With-said Abalanced;-via-lne#to controlfsaid inlet. 1 .i ...fr .w i' :l 4

9. Inla. device oiif,4 theg classtdescribedfa casingfhaving a'.chamberetherein, sai l thereinto tand" having double lout-let. forv the i passage of." steam: Ltliereifrcm,` afvsubstantialily balanced valve controlling the passages oi steamy through said double: outlet, andi an auxiliar-y valve Vopeiated by, theirst-.named valve' andi controlling the passagef'oi steam through said inlet. r

.O. Inaf device oh` the 'class` described", a casing .havingra chamber. therein, said cham',-

ber havingjaniinl'etf for thepassageoif steam thereinte and-:having a: double .outlet to n the passage von steam.`V therefrom, substantially. balanced` valve- .cont-rolling the passage ot',

yfsteainl through saldi deublefoutlet, anaux` iiiary valve 'controlling the passage of steam tlrrough'said inlet," i valveslinunison;` v e l1; In ai device: of "the: class 4des nnibedf,5a

-c asin'gdiaving a.V chamber therein, .said cham;- gberghavmg anfmlet for. the ,passage otisteam thereinto and Vhaving a double outlet for the passage of steamvthere'trom, a substantially balanced valve controlling the passage of steam through said double outlet, an auX- iliary valve controlling the passage of steam through said inlet, means to operate said valves in unison in one direction, and a spring normally holding said operating means in position wherein both of said valves are closed.

12. In a device of the class described, a casing having a chamber therein, said chamber being of general rectangular shape, opposite Walls of said chamber having aligned tion, and j a spring. normally;v holding/saith 0135 Illini l1 lil and means to operate lsai'd apertures therein forming a double outlet from said chamber, an inlet in another of said Walls for the passage of steam into said chamber, an auxiliary valve controlling said inlet, a substantially balanced valve controlling the passage of steam through said outlet, a shaft disposed transversely of said chamber, and means on said shaft to operate said latter valve.

13. In a device of the class described, a casing having a chamber therein, said chamber being of general rectangular shape, opposite walls of said chamber having aligned apertures therein forming a double outlet from said chamber, an inlet in another of said Walls for the passage of steam into said chamber, a substantially balanced valve controlling, the passage of steam through said outlet, a shaft disposed transversely of said chamber, an auxiliary valve disposed in said inlet, and means on said shaft to operate both of said valves in unison.

14. In a device of the class described, a casing having a chamber therein, said chamberbeing of general rectangular shape, opposite Walls of said chamber having aligned apertures therein forming a double outlet from said chamber, an inlet in another of said Walls for the passage of steam into said chamber, a substantially balanced valve controlling the passage of steam through said outlet, a shaft disposed transversely of said chamber, an auxiliary valve disposed in said inlet, means on said shaft to operate both of said valves in unison in one direction, and a -spring normally holding said operating means in position wherein both of said valves are closed. Y

l5. In a device of the class described, a casing having a chamber therein, said cham ber being of general rectangular shape, opposite Walls of said chamber having aligned apertures therein forming a double outlet from said chamber, an inlet in another of said Walls for the passage of steam into said chamber, a substantially balanced valve controlling the passage of steam through said outlet, a shaft disposed transversely of said chamber, an operating member on said shaft and comprising a cam adapted to operate said auxiliary valve, a transverse pin on said balanced valve, and means on said operating member loosely engaging said pin, for thc purpose set forth.

16. In a device of the class described, a valve casing having a chamber therein, said chamber having passages forming an inlet and a double outlet, a substantially balanced valve controlling one of said passages, and an auxiliary valve for closing the inlet, said auxiliary valve being connected With and actuated by said balanced valve.

17. In a device of the class described, a valve casing having a chamber therein, said chamber having passages forming an inlet. and an outlet, a substantially balanced valve controlling one of said passages, an auxiliary valve controlling the outer of said passages, means actuated by movement of said balanced valve to operate said valves in unisen, and means for automatically closing said valves.

1S. In a device 0f the class described, a casing having a chamber therein, said chamber having an inlet for the passage of steam thereinto and having a double outlet for the passage of steam therefrom, an auxiliary valve controlling said inlet, a substantially balanced valve controlling the passage of steam through said double outlet, said auxiliary valve being controlled by said ball anced valve, said balanced valve being so arranged that the pressure of steam will normally close the same.

19. In a device of the class described, a casing having a chamber therein, said chamber being of general rectangular shape, opposite Walls of said chamber having aligned apertures therein forming a doublet outlet from said chamber, an inlet in another of said Walls for the passage of steam into said chamber, an auxiliary valve controlling said inlet, a substantially balanced valve controlling the passage of steam through said outlet and having heads received in said aligned apertures, said auxiliary valve being controlled by said balanced valve, one of said heads being slightly larger than the other whereby the pressure of steam in said chamber normally tends to close said valve.

IVILLIAM E. BAKER.. 

